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Title:
DISCHARGE DEVICE AND AIR CONDITIONING DEVICE
Document Type and Number:
Japanese Patent JP2011234481
Kind Code:
A
Abstract:

To provide a discharge device in which power loss is reduced and an air conditioning device including the discharge device.

In a discharge device 9 of a power circuit 10 which is mounted on an air conditioning device and which supplies a motor drive circuit 3 with direct current voltage that is provided by smoothing the voltage supplied from a power supply unit 1 by a smoothing capacitor Cs, a switching element for discharge 5 which controls on/off of the discharge from the smoothing capacitor Cs to a discharge resistor Rd is connected in series with the discharge resistor Rd, and this is controlled by a discharge control circuit 8. The discharge control circuit 8 has a discharge starting function which turns on the switching element for discharge 5 by electrifying a passive circuit including resistors Rc, Ra, and Rb, which can be electrified anytime, with the regeneration voltage from the terminal voltage of the smoothing capacitor Cs and the regeneration voltage from the motor drive circuit 3 when the electric power supply from the power supply unit 1 is stopped. When the power supply is on, the discharge control circuit 8 turns off the switching element for discharge 5 by controlling the discharge starting function.


Inventors:
KAWAGUCHI SHUICHI
NAKAMURA NOBUHIRO
OGURI AKIHIKO
Application Number:
JP2010101885A
Publication Date:
November 17, 2011
Filing Date:
April 27, 2010
Export Citation:
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Assignee:
DAIKIN IND LTD
International Classes:
H02J1/00; H02J7/00; H02M7/48; H02P3/22
Domestic Patent References:
JP2002262573A2002-09-13
JP2001190060A2001-07-10
JP2009165208A2009-07-23
Attorney, Agent or Firm:
特許業務法人サンクレスト国際特許事務所



 
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